Journal bearing



Oct. 4, 1932. w. J. BAUROTH 1,880,660

JOURNAL BEARING Filed NOV. 19. 1927 Fig. 2

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* UNITE WALTER J. BAUROIH, F COLUMBUS, OHIO, ASSIG-NOR TO THE JEFFREY MANUFACTUR- ING COMPANY, OF COLUMBUS", OHIQ, A

GORPGEAEEON OF OHIO JOURNAL BEARING Application filed Novemberll), 1927. Serial No. 234,532.

The present invention relates to certain new and useful improvements in I journal bearings adapted to support the armature of an electric motor. 7

In the practice of coal mining the principal mining operations are conducted at the ever receding working face. The dislodged coal is loaded into cars, and transported from the mine along tracks laid in the mine entries, or galleries. Because of thenece rily restricted dimensions of these galleries the width and heighth of the locomotive must be kept within extremely narrow limits. The severity of the operating conditions requii unusual strength in allparts of the ap ratus. This has caused the development or a type of electric motor the overall length of which is reduced to the least dimensions compatible with efliciency and endurance. i The especial object of this invention 1s to provide a journal bearing sufiiciently rigid to withstand the service conditions encountered in coal mine operations, and of minimum longitudinal dimensions.

Another important object of th invention is to provide means of adjustment for the bearing relative to the shaft to compensate for wear and to maintain the bearing rigid at all times. 7

The further object is to provide the ournal hearing which can he readidismantled.

Other objects and advantages of the invention will become apparent during the course of the following description.

The means whereby I attain this oh' fully set forth in the following speci on. and illustrated in the accompanying drawing of which Fig. 1 is a plan view of an electric motor of the type to which my invention relates.

Fig. 2 is a fragmentary sectional view taken along the line HIl of Fig. 1.

Fig. 8 is a fragmentary enlargement of the driving end of the motor illustrated in Fig.

Like numerals refer to similar parts in the several figures.

In the drawing the numeral 1 refers to the field frame of an electric motor of the totally enclosed type. The numeral 2 refers to the end wall of'the field frame 1 in which is formed an inwardly projecting cylindrical cup 3 adapted to contain the journal bearings in which the armature of the motor is rotatively supported in the manner which will hereinafter be more fully described. lVithin the frame 1 is mounted an armature including a shaft 4 to which is secured the armature core 5. This shaft is provided with a circumferential shoulder 18, one side of which abuts the core 5 whichcarries the winding 6 in the manner which is well understood in the art. The proportions of the armature core 5 winding 6 are such that the lo1ngitudinally projecting portions of the wind ing 6 surround the cup 3 and project into close proximity with the end wall '2 of the motor casing. The armature shaft 4 is mounted concentrically of the cup 3 and projects through a circular aperture in the bottom wall 7 of said cup. Formed in the edge of the bottom Wall 7 is an annular groove with in which is arranged a suitable packing 8 which contacts with the surface of the shaft shoulder 18 to form a dust and gas tight joint therewith. To the projecting end of the shaft 4 a spur pinion 9 is secured against relative rotation by a key 10 and against longitudinal displacement by the head 11 of a machine screw 12 threaded into a suitable aperture in the end of the shaft 4. The screw' 12 is prevented from working loose by a metallic strip 13 fixed to the screw head 11 in any suitable and preferred manner, as by the rivet '14, and on this metallic strip is formed a projection 15 which engages a suitable notch in the'face of the pinion 9. snugly fitting the sh 1.6 of which snugly into the cup 3. This inner race l'liabuts against the shoulder 1.8 of the armature shaft 4- and is forcibly held in contact therewith by a screw collar 19 screw-threaded to the shaft 4 Formed on the outer faceof the collar 19 an outwardly projecting lug 9-0 adapted to and engage two of the teeth roject between 1 of the j 20 with the teeth 21 the screw ring 19 is 'curely.held against rotation relative to the aft 4 is the inner race 17 of hall bea ing, the outer race inion 9. By the engagement of the shaft l, thus preventing its working loose during the operation of tne motor.

The outer periphery of the screw ring 19 is equipped with a Lshaped flange 22 cooperating with a similar flange 23 formed on the inner periphery ofan externally threaded ring 24, which takes into threads formed in the outer portion of the cup-shaped depres sion of the casing 2. The cooperation bet 5 f1 0' 92 l 9 i1 1 in een r1e an cs .i anc. no provic es a ap oint between these two screw rings to exclude extraneous matter from the bearing, as

well as to prevent the escape of lubricant therefrom. In order to retain the ring 24 fixed 111 its ad ustment relative to the cup 7, a machine screw 25, shown in dotted l1 nes in Fig. 2, is threaded into the wall ,ofthe cup with its head fitting in a suitable depression formed in the casing 2, as well as in one of the notches provided in the exterior face of ment with the shoulder 18 of theshaft. The

screw collar 19 is then adjusted to place upon the shaft and tightened up to securely hold the race in working positionthereon, after which the pinion 9 1s shppedinto place upon the shaft l, the key 10 inserted in its keyway,

and the retaining screw 12 tightened up 'to force the pinion 9 to place, incidentally bringing the lug 20 between two of the teeth 21 of the pinion 9, thereby locking the parts in working relation.

It is to be understood that I do not limit myself to the precise construction here shown since it is evident that the devices here described may be subject to wide variation as to details without departure from the spirit of my invention.

What I claim is:

1. In a. journal bearing, the combination with a shaft having a circumferential shoulder, an anti-friction bearing, the inner race of which fits upon said shaft and abuts against said shoulder, a ring screw-threaded to said shaft to hold said inner race in forced contact with said shoulder, a pinion fixed to saidshaft outside of said bearing, and a lug on the ring projecting between and engaging the teeth of said pinion as and for the purpose set forth. H i

2. In a journal bearing, the combination with a shaft having a circumferential shoulder, an anti-friction bearing, the inner race of which fits on said shaft and abuts against said shoulder, a pinion fixed to said shaft outside of said bearing, means to hold said inner race in forced contact with said shoulder and means on the inner race holding means and cooperating with the teeth of said pinion, as and for the purpose set forth.

3. In a journal bearing, the combination with a shaft having a circumferential shoulder, an anti-friction bearing, the inner race of which fits on said shaft and abuts against said shoulder, a pinion fixed to said shaft outside of said bearing, means screw threaded to said shaft to hold said inner race in forced contact with said shoulder, and means formed on the outer face of said inner race holding means projecting between and engaging the teeth of said pinion as and for the purpose set forth.

4'. Inan electric motor, the combination with a field frame, a depression formed in the field frame, an anti-friction bearing, the outer race of which fits within said depression, a shaft having a circumferential shoulder, the inner race of aforesaid bearing mounted upon said shaft and abutting against said shoulder, means mounted upon said shaft to hold said inner race in contact with said shoulder, a pinion fixed to said shaft outside of said bearing and means on the inner race holding means cooperating with the teeth of said pinion as and for the purpose set forth.

In testimony whereof I have hereunto set my hand.

WALTER J. BAUROTH. 

